Siemens LMV51.140C1 Technical Instructions

TechnicalInstructions  LMVSeries
DocumentNo.LV5‐1000
Section7 Page8 SCCInc.

FlameFailure–ErrorCode25or26

Ifeitheranerrorcode25orerrorcode26isencountered,aflamefailurehasoccurred.An
errorcode25meansthataflamefailureoccurredduringpilot,whileanerrorcode26means
thataflamefailureoccurredduringoperation.Toremedyeitherfault,checkthefollowing:

1. Increasetheflamefailureresponsetimethroughthefollowingmenupath:

Params&Display>BurnerControl>Configuration>ConfigFlameDet>ReacTmeLossFlame

TheLMV5hasabaseflamefailureresponsetimeof0.8seconds.Thesettingofparameter
ReacTmeLossFlameadds
anadditional0.2–3.2secondsforamaximumofa4second
flamefailureresponsetime(FFRT).

2. Useaflamesourcetocheckiftheflamescannerisdefective.Theflamesignalcanbe
viewedusingthefollowingmenupath:

Params&Display>BurnerControl>Configurati
on>ConfigFlameDet>FlameSignal

ParameterFlameSigQRI_Bcanbeusedtoviewtheflamesignalwhenusinganinfrared
scanner(QRI2…)oranultravioletscanner(QRA7…).ParameterFlameSigIONcanbeused
toviewtheflamesignalwhenusingaflamerod.Aflamefailureoccursbelowa20%flame
signal.Iftheflamesignalreads0%whenusingaflamesource,checkthewiringofthe
scanner.SeeSection2forwiringassistance.Ifthewiringiscorrect,replacethedefective
scanner.

3. Ifanerrorcode25occurred,checkthewiringoftheignitiontransformerandpilotvalve.
Also,checktomakesureanymanualshutoffvalvesareopenonthepilotline.

4. Ifanerrorcode25occurred,checkthepositionoftheairdamperduringignition.Thiscan
beviewedusingthefollowingmenupath:

Params&Display>RatioControl>GasSettings>SpecialPosit
ions>IgnitionPos>
IgnitionPosAir

Decreasethispositionifthepilotflameisbeingblownout.

5. Ifanerrorcode26occurred,therecouldbeflamesignaldecayduetoglowingrefractory
insidetheboiler.Ifthisisthecase,replacetheQRI2…infraredscannerwithaQRA7…
ultravioletscanner.


HOME

Siemens LMV51.140C1 Specifications

General

Brand	Siemens
Model	LMV51.140C1
Category	Control Systems
Language	English